Cheapticket.in / Airtickets India — cheating and wrong fare

I want change date my ticket and i call airline they told total charges rs 6430 cheapticket charge 13000 duble of this then i call all time they disconnected phone then i call from. Another phone i when i speak with them they not provide right detials i pay nearly 13000 i need to change never see like these theif my booking id 943393 i want justice why thy charge duble